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Science 10 December 2004:
Vol. 306. no. 5703, p. 1857
DOI: 10.1126/science.306.5703.1857p
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This Week in Science

Plants defend against certain pathogens in a gene-for-gene manner, with specific defense proteins aligned against specific pathogen strains. As pathogens evolve, so must defenses. The greatest variability from the plant's side lies within a domain of its defensive response protein that is implicated in protein-protein interactions. Rapidly diverging defensive alleles are now shown by Allen et al. (p. 1957) to be faced off against rapidly diverging alleles in the invader's pathogenicity effectors. Both the plant's response gene and the pathogen's effector gene show genetic polymorphism driven by balancing selection.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)